The paper aimed to ascertain the possibility of using the chemometric (discriminant) method when analyzing the results of mid-range IR spectroscopy and gas chromatography-mass spectrometry for a comparative study of heroin to establish a common source of origin. The advantage of this method of comparative research in comparison to the existing ones is the reduction in the time for obtaining the result, the clarity and automation of the comparison process, which is essential for the comparative study of a large number of objects and the keeping of the corresponding type of forensic accounting. The paper shows that the results obtained by chemometric processing of data from two non-correlating analysis methods (IR spectroscopy and gas chromatography-mass spectrometry) coincided.
This work aimed to study the possibility of using chemometric methods in the analysis of IR spectra in the middle region for a comparative study of narcotic drugs. The results of using a chemometric (discriminant) method for analyzing the IR spectra of the middle IR-region of samples of the narcotic drug α-pyrrolidinovalerophenone from different sources of seizure are presented, which allowed us to divide the investigated substances into different classes and refer them to different sources. It was found that when forming the table of standards, it is necessary to minimize the influence of the background, the concentration of the active substance in the tablet with potassium bromide, and the thickness of the light-absorbing layer.
Information on some vehicles dyeing technologies produced in Gorky Automobile Plant is presented, experimental infrared spectra of enamels and primer paints used for their dyeing are obtained.
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